%0 Generic %1 tacchella2015evolution %A Tacchella, Sandro %A Dekel, Avishai %A Carollo, C. Marcella %A Ceverino, Daniel %A DeGraf, Colin %A Lapiner, Sharon %A Mandelker, Nir %A Primack, Joel R. %D 2015 %K galaxy high-z quenching simulation %T Evolution of Density Profiles in High-z Galaxies: Compaction and Quenching Inside-Out %U http://arxiv.org/abs/1509.00017 %X Using cosmological simulations, we address the interplay between structure and star formation in high-redshift galaxies via the evolution of surface density profiles. Our sample consists of 26 galaxies evolving in the redshift range $z=7-1$, spanning the stellar mass range $(0.2-6.4)10^10M_ødot$ at $z=2$. We recover the main trends by stacking the profiles in accordance to their evolution phases. Following a wet compaction event that typically occurs when the stellar mass is $\sim10^9.5~M_ødot$ at $z\sim2-4$, the gas develops a cusp inside the effective radius, associated with a peak in star-formation rate (SFR). The SFR peak and the associated feedback, in the absence of further gas inflow to the centre, marks the onset of gas depletion from the central 1 kpc, leading to quenching of the central SFR. An extended, star-forming ring that forms by fresh gas during the central quenching process shows as a rising specific SFR (sSFR) profile, which is interpreted as inside-out quenching. Before quenching, the stellar density profile grows self-similarly, maintaining its log-log shape because the sSFR is similar at all radii. During the quenching process, the stellar density saturates to a constant value, especially in the inner 1 kpc. The stellar mass and SFR profiles deduced from observations show very similar features, consistent with the scenario of wet compaction leading to inside-out quenching and the subsequent saturation of a dense stellar core. We predict a cuspy gas profile during the blue nugget phase, and a gas-depleted core, sometimes surrounded by a ring, in the post-blue nugget phase.

@misc{tacchella2015evolution, abstract = {Using cosmological simulations, we address the interplay between structure and star formation in high-redshift galaxies via the evolution of surface density profiles. Our sample consists of 26 galaxies evolving in the redshift range $z=7-1$, spanning the stellar mass range $(0.2-6.4)\times 10^{10}M_\odot$ at $z=2$. We recover the main trends by stacking the profiles in accordance to their evolution phases. Following a wet compaction event that typically occurs when the stellar mass is $\sim10^{9.5}~M_{\odot}$ at $z\sim2-4$, the gas develops a cusp inside the effective radius, associated with a peak in star-formation rate (SFR). The SFR peak and the associated feedback, in the absence of further gas inflow to the centre, marks the onset of gas depletion from the central 1 kpc, leading to quenching of the central SFR. An extended, star-forming ring that forms by fresh gas during the central quenching process shows as a rising specific SFR (sSFR) profile, which is interpreted as inside-out quenching. Before quenching, the stellar density profile grows self-similarly, maintaining its log-log shape because the sSFR is similar at all radii. During the quenching process, the stellar density saturates to a constant value, especially in the inner 1 kpc. The stellar mass and SFR profiles deduced from observations show very similar features, consistent with the scenario of wet compaction leading to inside-out quenching and the subsequent saturation of a dense stellar core. We predict a cuspy gas profile during the blue nugget phase, and a gas-depleted core, sometimes surrounded by a ring, in the post-blue nugget phase.}, added-at = {2015-09-02T08:57:35.000+0200}, author = {Tacchella, Sandro and Dekel, Avishai and Carollo, C. Marcella and Ceverino, Daniel and DeGraf, Colin and Lapiner, Sharon and Mandelker, Nir and Primack, Joel R.}, biburl = {https://www.bibsonomy.org/bibtex/2af848cdb5518efa4fa2a0bfc9b667114/miki}, description = {[1509.00017] Evolution of Density Profiles in High-z Galaxies: Compaction and Quenching Inside-Out}, interhash = {bc5a56a67e9e9c6aec30d6d57dc9c909}, intrahash = {af848cdb5518efa4fa2a0bfc9b667114}, keywords = {galaxy high-z quenching simulation}, note = {cite arxiv:1509.00017Comment: 23 pages, 14 figures. Submitted to MNRAS}, timestamp = {2015-09-02T08:57:35.000+0200}, title = {Evolution of Density Profiles in High-z Galaxies: Compaction and Quenching Inside-Out}, url = {http://arxiv.org/abs/1509.00017}, year = 2015 }